MT_AVRA gives the right ascension of a moving target averaged over all exposures within an observation. It is the simple mean of the MT_RA values in each exposure. The average position is used to compute an appropriate WCS offset for each exposure so that the target is properly aligned when creating combined images/spectra.
Attribute | Value |
---|---|
data type | float |
enumerated Values | not defined |
units | deg |
example | 42.315892 |
default value | |
special processing | OPTIONAL |
source | Calibration Software |
software source | |
calculation | |
DB destination | ['ScienceCommonExt.mt_avra'] |
data type in DB | float |
instrument | ALL |
mode | All |
product level | 2c |
FITS hdu | SCI |
FITS header section | WCS Parameters |